JAMDAT Mobile Selects Vladimir Guerrero as Cover Athlete for JAMDAT SP

    Business Editors/High-Tech Writers/Baseball Writers

    LOS ANGELES--(BUSINESS WIRE)--March 23, 2005--Global wireless entertainment publisher JAMDAT Mobile Inc. (NASDAQ:JMDT) announced today it has signed 2004 American League Most Valuable Player Vladimir Guerrero of the Anaheim Angels to be the cover athlete for its upcoming mobile game, JAMDAT SPORTS MLB 2005. The game, published under license with Major League Baseball Advanced Media, is scheduled for release this spring to coincide with the start of the 2005 Major League Baseball season.
    "Vladimir Guerrero embodies the passion, power and grace of Major League Baseball, making him a great fit for the cover of JAMDAT SPORTS MLB 2005," said Mitch Lasky, Chairman and CEO of JAMDAT Mobile Inc. "Whether it is a 500-foot home run, an incredible outfield catch or a stolen base, JAMDAT SPORTS MLB 2005 will deliver the same intense baseball performance that earned Vladimir the 2004 MVP award."
    Guerrero was named the 2004 American League MVP after he hit .337 with 39 home runs and 126 RBIs, leading the league with 124 runs and 366 total bases. In his first year in the American League, Guerrero led the Anaheim Angels to the American League West Division title and, in doing so, became one of only five players to win the MVP in their first season in a new league.
    Game availability depends on individual phone model and wireless carrier. For specific information, JAMDAT's Game Finder is available at www.jamdat.com.

    About JAMDAT Mobile

    JAMDAT Mobile Inc. (NASDAQ:JMDT) is a global publisher of wireless entertainment applications, including games, ring tones, images and other content. JAMDAT's application portfolio is based on original and licensed intellectual properties and includes JAMDAT Bowling, Lemonade Tycoon(TM), Bejeweled, The Lord of the Rings(R), Tony Hawk's(R) Underground and Scrabble(R). JAMDAT distributes its applications through wireless carriers, including Boost Mobile, China Mobile, Cingular Wireless, 02 (UK), Nextel, NTT DoCoMo, Orange, Sprint, Telefonica Moviles, T-Mobile, Verizon Wireless, Virgin Mobile, Vivo and Vodafone. For more information, please visit www.jamdat.com.

    Safe Harbor Statement -- JAMDAT Mobile Inc.

    This press release may include forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995, including statements related to anticipated revenues, expenses, earnings, operating cash flows, the outlook for JAMDAT's markets and the demand for its products. Factors that could cause JAMDAT's actual results to differ materially from these forward-looking statements include its ability to effectively market and sell products in diverse market segments, its reliance on a limited number of products and third-party vendors and distributors, its ability to expand studio operations, increases in fulfillment costs, disruptions to information technology systems, unpredictable events and circumstances relating to international suppliers, increased competition, government regulatory action and general economic conditions. Please refer to JAMDAT's reports and filings with the Securities and Exchange Commission for a further discussion of these risks and uncertainties. Readers are cautioned not to place undue reliance on forward-looking statements, which speak only as of the date they are made. JAMDAT undertakes no obligation to update publicly any forward-looking statements to reflect new information, events or circumstances after the date they were made or to reflect the occurrence of unanticipated events.

    (C) 2005 JAMDAT Mobile Inc. JAMDAT, JAMDAT Mobile and the bubbles logo are trademarks of JAMDAT Mobile Inc. All other trademarks are the property of their respective owners.

    (C) MLBPA-Official Licensee, Major Baseball Players Association. Visit the Players Choice on the web www.MLBPlayers.com. The Major League Baseball Players Association is the collective bargaining representative for all professional baseball players of the National League and the American League and serves as the exclusive group licensing agent for commercial and licensing activities involving active Major League Baseball Players. On behalf of its members, it operates the Players Choice licensing program and Players Choice Awards and Big League Challenge events, which benefit those less fortunate through the Major League Baseball Players Trust, a charitable foundation established and run entirely by Major League Baseball Players.

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CONTACT: for JAMDAT Mobile Inc. Dena Cook, 310-566-2283 dena.cook@zenogroup.com

KEYWORD: CALIFORNIA INDUSTRY KEYWORD: SPORTS GAMING TELECOMMUNICATIONS MARKETING AGREEMENTS SOURCE: JAMDAT Mobile Inc.

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